package com.ruoyi.app.controller;

import cn.hutool.core.util.RandomUtil;
import com.google.code.kaptcha.Producer;
import com.ruoyi.common.annotation.Anonymous;
import com.ruoyi.common.core.controller.BaseController;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.utils.RedisUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Base64;
import java.util.HashMap;
import java.util.Map;

/**
 * 图片验证码（支持算术形式）
 *
 * @author ruoyi
 */
@Controller
@RequestMapping("/app-api/captcha/")
@ResponseBody
public class ApiCaptchaController extends BaseController {
    @Resource(name = "captchaProducer")
    private Producer captchaProducer;

    @Resource(name = "captchaProducerMath")
    private Producer captchaProducerMath;
    @Autowired
    private RedisUtils redisUtils;

    /**
     * 验证码生成
     * <img src="http://10.0.61.193:8080/captcha/captchaImage?type=char">
     */
    @Anonymous
    @GetMapping(value = "/captchaImageForApp")
    public AjaxResult getKaptchaImage(HttpServletRequest request, HttpServletResponse response) {
        Map<String, Object> result = new HashMap<String, Object>();
        try {
            response.setDateHeader("Expires", 0);
            response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
            response.addHeader("Cache-Control", "post-check=0, pre-check=0");
            response.setHeader("Pragma", "no-cache");
            response.setContentType("image/jpeg");

            String type = request.getParameter("type");
            String bizType = request.getParameter("bizType");
            String loginName = request.getParameter("loginName");
            loginName =  RandomUtil.randomNumbers(6);
            if (StringUtils.isBlank(type) || StringUtils.isBlank(loginName)) {
                return null;
            }

            String capStr = null;
            String code = null;
            BufferedImage bi = null;
            if ("math".equals(type)) {
                String capText = captchaProducerMath.createText();
                capStr = capText.substring(0, capText.lastIndexOf("@"));
                code = capText.substring(capText.lastIndexOf("@") + 1);
                bi = captchaProducerMath.createImage(capStr);
            } else if ("char".equals(type)) {
                capStr = code = captchaProducer.createText();
                bi = captchaProducer.createImage(capStr);
            }

            redisUtils.set("verify_" + loginName , code, 60);
            logger.info(loginName+"验证码:"+code);
            //out = response.getOutputStream();
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            ImageIO.write(bi, "jpg", baos);

            byte[] bytes = baos.toByteArray();
            String base64img = Base64.getEncoder().encodeToString(bytes);
            //baos.flush();
            result.put("img",base64img);
            result.put("res",loginName);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return AjaxResult.success("成功",result);
    }
}